Rotary engine.



. R. P. C. KBATS.

ROTARY ENGINE. APPLIOATION FILED 11017.12, 1910.

Patented Jan. 17,1911.

` which steam expands before passing the proimpinge again andagain upontheteethiof l ROBERT FORD COURTENAY KEATS, 0F PORTSMOUTH, ENGLAND.

ROTARY ENGINE.

Specification of -Letters' Patent.

Patented Jan. 17, 1911.

' Application led November 12, 1910. Serial No. 591,961.

To all lwhom t may concern:

Be it known that I, ROBERT Fono COURTE- NAY KEATS, a subject of the Kingof Great Britain, residing at 9 Garnier street, Frat- Iton, Portsmouth,in the 'county of Hampshire, England, have invented a new and usefulRotary Engine, of which vthe following is a specification.

This invention relates to improvements in rotary engines of the type inwhich two toothed wheels which mesh with one another are rotated in twochambers side by side by the pressure of steam or other fluid deliveredvbetween the wheels near to the plane through their axes.

The accompanying drawing is a transverse section ofv an engine made inaccordance with this invention.

a a are the two wheels rotating in chambers b provided with blocks orabutments c d, which fit steam tight to the teeth of the wheelsandshould be adjustable to take up Wear.

e is the admission we fl g g are exhaust ports leadmg to a common pipe hand -z' is an exhaust port common to the two wheels.

t- Z' mare three projections on the inside of-either casing b, theclearance between the port from the supply projections Z and the teethof the Wheels being greater than .that at lc and that at m being greaterthan tha-t at l.

\ fw, w, 1/ indicate de ressions or recesses on the inside of the wal sof the `chambers into jections le, Z, m,

The projections c Z m cause the fuid to engine.

the Wheels and increase the efliciency of the IVhat I claim is A1. In arotary engine, the combination of two chambers side by side, twotoot-hed wheels in the chambers meshing with one another, an inlet portfor the motive fluid delivering to the intermeshing portions ofthewheels, an abutment fitting steamtight to the wheels on opposite sides'of the inlet, an abutment fitting steaintight to the wheels at theirintermeshing portions on the exhaust side of the engine, anexhaust portfor each chamber, a projection interposed between the exhaust port ofone of the chambers and the abutment therein next the inlet port, and arecess in the chamber walls between-the projection and said abutmentinto which t-he motive fiuid carried around by the teeth of t-he Wheelin said chamber expands after leaving the abutment and before passingthe projection.

2. In a rotary engine, the combination of two chambers side by side, twotoothed wheels in the chambers meshing with one another, two a-butmentsfitting steam tight l to the teeth of the wheels, a fluid inlet-betweenthe wheels, an exhaust port in each chamber, `and a series ofprojections on the inside of'thecasing of each chamber between the firstabutment andthe exhaust port, the clearance between the projections andthe teeth of the Wheels increasing from the inlet to the exhaust port.aonlir rein) coUa'rENArKErrs.

Witnesses:

ALBERT W. SWALM, CHARLES PACK.

